High‐Temperature Driven Recrystallization for Stable Dopant‐Free α‐FAPbI<sub>3</sub> Perovskite Solar Cells

High temperatures facilitate the formation of stable, high-crystallinity α-FAPbI<sub>3</sub> films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot-press-assisted recrystallization strategy is reported to grow stable phase-pure α-FAPbI<sub>3</sub> film without any dopants. High temperature can promote the transformation of δ-FAPbI<sub>3</sub> to α-FAPbI<sub>3</sub>, and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α-FAPbI<sub>3</sub> film prepared by hot-press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp-heat stability, showing no significant change after 20 s in deionized water. The result solar cell delivers a power conversion efficiency as high as 24.06% and retains >70% of their initial efficiency value after 1000 h at 85 °C and 85% relative humidity.

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Publication Details

Journal
Advanced Science
Published
2024-11-11
DOI
https://doi.org/10.1002/advs.202408684
Citations
9
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
1.88

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article

High‐Temperature Driven Recrystallization for Stable Dopant‐Free α‐FAPbI3 Perovskite Solar Cells

Xiaoli Xu, Guifu Zou, Lutao Li, Yu Chen et al.
9 citations
Advanced Science
Perovskite Materials and Applications
1.88
article

High‐Temperature Driven Recrystallization for Stable Dopant‐Free α‐FAPbI3 Perovskite Solar Cells

Xiaoli Xu, Guifu Zou, Lutao Li, Yu Chen, Zheng‐Hong Lu, Lingbo Xiao, Wang Chen, Jie Zhao, Liang He
article en
9 citations

Abstract

High temperatures facilitate the formation of stable, high-crystallinity α-FAPbI<sub>3</sub> films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot-press-assisted recrystallization strategy is reported to grow stable phase-pure α-FAPbI<sub>3</sub> film without any dopants. High temperature can promote the transformation of δ-FAPbI<sub>3</sub> to α-FAPbI<sub>3</sub>, and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α-FAPbI<sub>3</sub> film prepared by hot-press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp-heat stability, showing no significant change after 20 s in deionized water. The result solar cell delivers a power conversion efficiency as high as 24.06% and retains >70% of their initial efficiency value after 1000 h at 85 °C and 85% relative humidity.

Advanced ScienceVol. 11(48)
Zhejiang University of Science and Technology (CN), Soochow University (CN), LDK Solar (China) (CN), Institute of High Energy Physics (CN), China Jiliang University (CN), Southeast University (CN)
Accelerate Brain Cancer Cure, National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Changzhou University, Soochow University, Natural Science Foundation of Zhejiang Province
Openalex Percentile: Top 14%
Perovskite Materials and Applications
1.88
DOIOpen Access PDFOpenAlex
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